2. Although not all women would like to marry a polygamist, women may agree because they far outnumber their male counterparts, and for fear of being alone. Social disorder may result. Some men would take advantage and effectively use it to achieve their individual promiscuous goals to the detriment of the female population.
3. People living below the official poverty line are in no hurry to have children without state welfare and family subsidies. Even if there is a demographic crisis there should be a more refined means for solving the problem.